One interesting plotline could be exploring their relationship in their early Hogwarts days more in - depth. Maybe showing how Severus first fell in love with Lily and the little moments they shared in the library or on the grounds. Another could be a what - if scenario where Lily didn't end up with James and Severus had a chance to rekindle their friendship and perhaps more. A third could be a story from Severus' perspective after Lily's death, how his memories of her still haunted and drove him in his actions within the wizarding world.
Well, a possible plotline is that Severus uses magic to go back in time to try and change things with Lily. He might try to be more honest with her about his feelings earlier or to distance her from the Marauders who he saw as a threat to their relationship. Another plotline could be that Lily discovers a hidden side of Severus that she never knew before, like his secret talents in a certain type of magic, and this new discovery deepens their bond. And then there could be a plot where after Lily's death, Severus has visions of her and they communicate in a sort of spiritual realm, which changes his path in the fight against Voldemort.
Some plotlines could involve Severus and Lily's relationship during the time when the wizarding world was starting to be divided by Voldemort's rise. For example, Severus could be torn between his loyalty to Lily and his involvement with the Death Eaters. Lily might also be in a position where she has to choose between trusting Severus or believing the rumors about him. Another plotline could be a prequel - type story that shows their childhood together, growing up in Cokeworth, and how their different magical abilities and family backgrounds affected their relationship from the very start. Also, a story could focus on how Lily's Patronus, which was a doe, related to her relationship with Severus, perhaps it was a symbol of something deeper between them.
A great plotline might be Snape teaching Lily Luna Potter some of his signature potions in a private tutoring session. Through these interactions, they develop a unique bond. Or perhaps Lily Luna Potter gets into a dangerous situation, and Snape is the only one who can save her because of his in - depth knowledge of the dark arts. This would create a scenario where she has to trust him completely, despite his often - misunderstood reputation.
One common plotline is time - travel. For example, Harry might go back in time and interact with Lily Potter in a way that changes the course of events. Another could be an alternate universe where Lily survives and she and Harry have a different kind of relationship, perhaps more of a mentoring one.
One interesting plotline is when Lily is given the chance to change the future. In some fanfictions, she has the power to go back in time and make different choices, like whether to marry James or not. Another is when she discovers hidden magic within herself that no one else knew about. This often leads to her having to face new challenges and enemies.
One interesting plotline could be Snape and Harry having to work together on a secret project for Dumbledore. They start off distrusting each other but as they face challenges, they gradually become friends. For example, they might be researching a powerful dark magic spell that Voldemort is after, and in the process, they learn about each other's past traumas and start to empathize.
Some fanfictions have a plotline where Snape survives the Battle of Hogwarts and he and Harry have to deal with the aftermath together. They might have to face the wizarding community's reaction to Snape's past actions and also work on rebuilding Hogwarts. There are also stories where Harry, while still at school, starts to understand Snape's difficult position between Dumbledore and Voldemort and tries to help him in some way, which creates a whole new dynamic between them.
One interesting plotline could be Harry growing up with Snape's guidance and inheriting his potions skills at an early age. He might have a different dynamic with the other Hogwarts students, being more of an outcast due to his connection to the often - misunderstood Snape.
One possible plotline could be that James and Lily return and have to deal with the changed wizarding world. They might be shocked at how much Voldemort's actions have affected society even after his defeat. Another could be that they return to help Harry face new threats that are emerging from the shadows of the old war.
A common plotline is Lily Luna Potter finding a hidden part of Hogwarts that was unknown to her father. This could involve her exploring an old chamber and discovering secrets about the founders of the school. It's a great way to expand on the existing Harry Potter lore without any adult themes.
One interesting fanfiction could be where Lily and Severus reconcile in an alternate universe after her death. In this story, Lily's spirit somehow manages to communicate with Severus more directly. It shows a different side of their relationship, exploring the deep-rooted connection they had before everything went wrong.
One interesting plotline could be Lily Potter's adjustment to the new era she returns to. Maybe she has to deal with new magical technologies and social changes. Another could be her reuniting with old friends and family, like Harry, and how their relationships evolve.